Enter Shipment Details
Example Data Table
| Commodity | Dimensions | Weight | Density | Density Class | Estimated Class |
|---|---|---|---|---|---|
| Palletized retail goods | 48 × 40 × 42 in | 425 lb | 8.68 lb/ft³ | 100 | 100 |
| Fragile display fixtures | 60 × 48 × 72 in | 380 lb | 3.17 lb/ft³ | 250 | 300 |
| Hazmat drums | 40 × 48 × 48 in | 620 lb | 11.63 lb/ft³ | 85 | 125 |
| Stackable auto parts | 48 × 40 × 36 in | 710 lb | 17.75 lb/ft³ | 65 | 65 |
Example values are illustrative. Final classification should be matched against the exact commodity listing and carrier rules.
Formula Used
1) Cubic feet per piece
Volume = (Length × Width × Height) ÷ 1,728
2) Total cubic feet
Total volume = Cubic feet per piece × Number of pieces
3) Density
Density = Total shipment weight in pounds ÷ Total cubic feet
4) Density-based class
The calculator maps pounds per cubic foot to standard density classes such as 50, 55, 60, 65, 70, 77.5, 85, 92.5, 100, 110, 125, 150, 175, 200, 250, 300, 400, and 500.
5) Adjustment review
Flags for fragility, hazardous goods, irregular shape, stackability, packaging strength, perishability, and value risk can move the estimate upward for review.
How to Use This Calculator
- Enter the shipment description, piece count, dimensions, and total weight.
- Select the correct measurement units for dimensions and weight.
- Choose packaging details and answer each freight risk question.
- Click the calculate button to see the estimated class above the form.
- Review density, class range, confidence, and operational notes.
- Download the calculation as CSV or PDF for quoting records.
- Confirm the final class against the exact commodity NMFC item before booking.
Freight Class FAQ
1. What does freight class mean in LTL shipping?
Freight class is a standardized rating used for less-than-truckload pricing. It reflects density, stowability, handling difficulty, and liability, which together shape shipment cost and carrier planning.
2. Is density the only factor that determines class?
No. Density is often the starting point, but stowability, handling, and liability can change the final class. Commodity-specific NMFC items can also override simple density estimates.
3. Why can a low-density shipment cost more?
Low-density freight uses more trailer space for its weight. That usually places it into a higher class, which increases the rate because the load is less space-efficient.
4. Why does stackability affect the result?
Non-stackable freight limits how carriers can use trailer space. That reduces stowability efficiency, which can push a shipment toward a higher class or trigger manual review.
5. Can packaging change my freight class?
Yes. Weak or awkward packaging can increase handling risk and damage exposure. Crating, reinforcement, or better palletization may improve handling confidence, though the commodity rule still matters.
6. Does this calculator give an official NMFC ruling?
No. It provides an informed estimate using density and common risk factors. The official class should be confirmed against the exact NMFC item and carrier requirements.
7. What unit should I use for weight and dimensions?
Use the units that match your measuring process. The calculator converts them internally to inches and pounds so density can be evaluated consistently in pounds per cubic foot.
8. When should I contact a carrier or broker for review?
Ask for review when freight is hazardous, fragile, high-value, irregular, perishable, or commodity-specific. Those conditions can shift class beyond a simple density-only estimate.